Troubleshooting Guide - Airstream TC4-2N6F User Manual

PROBLEM
There is no
display.
The display
shows "P" when
the parameter
selection knob
is set to OUT-
SIDE SET-
TINGS.
The display
shows "P" when
the parameter
selection knob
is set to ROOM.
The defective
probe pilot light
is on.
44
TC4-2N6F.rev.07
CAUSE
The circuit breaker
at the service panel
is off or tripped.
The wiring is
incorrect.
The voltage selector
switch is in the
wrong position.
The display board
interconnect cable
is not properly
plugged into the
power supply board.
The outside probe
is connected
improperly.
The outside probe is
defective.
A room probe is
connected improp-
erly.
A room probe is
defective.
A room probe is
defective.
SOLUTION
Reset the circuit breaker.
Correct the wiring.
Set the switch to the correct
position.
Be sure the cable is firmly
plugged in.
Correct the outside probe
connection.
Refer to "Defective Probes"
Correct the room probe
connection.
Refer to "Defective Probes"
Refer to "defective probes"